Bridging device for fuse-receptacles.



CLA. BATES.

BRIDGING DEVICE FOR FUSE RECEPTACLES.

APPLICATION FILED JAN.2 1` 191s.

1,252,219. E Patented Jan. 1,1918.

5 noa/lio@ BTES, 0F BRIBGEPRT, CONNECTICUT, ASSGNGH, TO 'FELT RYANT ELECTRC CMENY, @F BRDGEPORT, CONNECTICUT, GGREGRATION DF GN- EETECUT.

IBRBGNGDEVICE FOR FUSELECEPTACLES.

rpeeteetion of Letters Patent.

Patented iene Lt, i.

Applicaties nie@ January 21, 1916. Serial Ne. 73,432.

To ail wom may @einem Be it known that l, CLARENCE Berne, e citizen ot .the Unitefl States oi America, and 'residing at Bridgeport, in the county of e Feireic enftete et onnecticut, have in vente e. certain new and improved Bridging Device or-Fuseleceptecies, of which 'the ollowing'is speoiiicrationq My invention relates to e. bridging 'device to for fuse receptaeies and the object of my invention is to provide e simple and inexpensive fitting which may be eppied to stendere fuse receptacles to bridge the contents ci tge intter and establish e full cepacity connection between the seme in place the ordinary fuse of limitetl capacity.

' En the accempenying drawings, i

Figure l e perspective of e cut-out block with associated fuse plug and briciging de 2e vice in position be insertei;

Fie. 2 pien. of seid block;

` 8 lis e section through one o the receptecies of the biock with the .bridge jriece inserted and partially broken away;

e is en enierged sect-ion similar to is inverted plan of the body of pi-ce; and l t rep ee, perspective et the parte `een e common practice in Wiring ns to provide e grounded connection te system troni the dangers oft everlcecier. circuit. lThis grounded c s in moet eases been established 'ign s fused The practice et using n grounded iine has been disapl by' the l rtienel Board of F ire Un L with result that e. change in sting instnliations 'nes been required to niente the .fuse in the ground iine. Where l'tiple ruse blocks have been used, eevnpiience vait-li tire Unerwriters regualies necessitated ei'tiier the riiscnrding; 1 inultipie fuse bloeit in the grounded connectioinor s makeshift device between. the contacts of the fuse bleek. y

The present invention provides a simple and inexpensive bridging device which may e inserteri :En any fuse block to eorel4 n Werirmeiiliire bridge of fuit eepecity beM tween the contacts of the receptacle Referring to the accompanying tlretvings, roultipie fuse block L'G of common type is nere eher-vn eeniprieing beek o insulartion having mounted thereon e pair o plug receptacles ll and l2 with usuel Wire terminals 13, 14.-, 15 end 16. The Wire terminals 13 and 14 take the current to the shell contacts i7 .and 18, While the terminals 15 and v60 lo are connected to the center contacts '19.

t zo 'formed trein e single integral sheet of copper. The upper edge of the sheet is spun over the upper fece of the bloei: 23 et 26 to rigidly assembie these parts.

ln order to prevent swiveiinjg of the shell on the block, e. pair of studs 27 and 28 are pressed inward from the entering" enti ofthe` shell to engage in correspending` Wells 29 80 and 3G formed in the lower fece of the block. A thread 3l of stenfsrd pitch is formed on the shell to eng-nge die thread of the receptacle shell Contact l?. A transverse groove 32 formed in the upper face of the porcelain bioclr of proper dimensions to receive tbeend of e screw-driver, thus'en- @Joling the ".virernan to readily insert 'the briclging' clevice and screivtiie seine fully home in the receptacle, Without danger to himself, since the screi driver dees not come in Contact with the contacts of the (levies.

Et is obvious that when the prese t bridging device is inserted it t'orins e connector of full capacity between the sheil i? and center Contact l@ of the receptacle l2, time giving en uninterrupted connection through the. fuse ping recepteeie to the ground. lWliile this connection is suicient te enable the lineman to meet the Underwriters requirement, it vzfoulri be possible to remove the device and again reinsert a fuse plug, unless some means are provided for permanently securing the device in its inserted position. ifo afford means for preventing such a 1re- A movel, il have associated with tile device a,

snieii piece of readily usibie solder, here in shell 24e. This block of solder -maytalre the 4 a head which is engaged by the rolled over edge 26 of the shell, thus preventing its accidental loss before it has been utilized. After the device has been inserted and screwed home, it is only necessary to apply a hot soldering iron to the exposed portion of the solder wire 83 to melt the latter so that it runs down and escapes through the hole 35 in the shell, soldering the latter tothe screw shell 17 of the receptacle. Of course it is possible to pour a drop or two of solder into the well 84 in case the stick 33 has been lost, thus accomplishing the same result. It is now practically impossible to remove the bridging device from the receptacle.

The presentdevice afords, as will be seen, apsimple and inexpensive fitting which may be readily installed and permanently secured in the receptacle in place of the fuse plug without injury to either and without changing the installation otherwise than by the removal of the fuse plug and the substitution therefor of the present bridging device. This is a matter of only two minutes work and of practically negligible expense.

"While I have illustrated my invention in a form which is commercially practicable and economical, various modifications of construction will readily occur to those skilled in the art without departing from what I claim as my invention. In the following claims I use the term full capacity in the sense of a conductor having a current-carrying capacity substantially equal to that of the line in which it is inserted, even under abnormal load.

l claim as my invention 1. A bridging device for fuse receptacles, comprising a plug having a full capacity connection between the shell and center contacts thereof and means for permanently securing said plug in inserted position.

2. A bridging device for fuse receptacles, comprising an insulating body and contacts thereon adapted to engage the receptacle contacts and establish a full capacityconnection between the latter and means for permanently securing said plugin inserted position.

3. A bridging device comprising an insulating body having integral shell and center contacts thereon and a block of solder carried by said insulatingbody in position to solder on melting the 'shell contacts of said bridging device and receptacle.

4. A bridging device comprising a blocl; of insulation, a shell contact mounted thereon and a. supply of solder carried by said insulating body, said shell being perforated to permit the flow of said solder on melting into the` space between said shell and the shell of the receptacle.

5. A bridging device comprising an insulating' body, a shell and center contact mounted thereon and having a full capacity connection between the same, together with a supply of solder carried by said device in position to flow between one of said contacts and a receptacle contact upon melting after the device has been installed.

6. A bridging device comprising an insulating body, a shell contact thereon, the latter being apertured to permit the flow of solder therethrough into the space between the same and the-receptacle shell contact to rigidly secure said device in inserted position.

7 A bridging device for plug receptacles comprising a. plug having integral shell and 4center contacts and means for permanently ledge in combination with integral screw shell and center contacts surrounding said button, the outer margin of said screw shell engaging said ledge to secure said parts in assembled position, together with means to prevent relative rotation of said screw shell and insulating button.

10. A bridging device for plug receptacles comprising a button of insulating material recessed at its outer margin to form a soldering well, together with a screw shell surrounding said button and apertured in register with said well to permit the flow of solder therethrough to the shell contact of a coperating receptacle, for the purpose described.

ln testimony whereof I have signed vmy name to this specification, in the presence of two subscribing witnesses. 

